US3565571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Agents for dyeing of human hair with nonionic direct dyes
Assignee: Therachemie Chemische Therapeutische GmbH
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Filing: 1965-08-25
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Granted: 1971-02-23
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Expires: 1985-08-25
Abstract
Abstract A PROCESS FOR THE APPLICATION OF AGENTS WHICH IMPROVE THE DYEING OF HAIR, PARTICULARLY LIVING HUMAN HAIR, WITH NONIONIC DIRECT DYES IS DISCLOSED. THE HAIR IS TREATED WITH SOLUTIONS, DISPERSIONS OR EMULSIONS OF THE FOLLOWING COMPOUNDS: (A) CARBONIC ACID OR SULFUROUS ACID ESTERS OF ALKYLENE GLYCOLS HAVING 2 TO 4 CARBON ATOMS; (B) ESTERS OF ALIPHATIC ALCOHOLS HAVING 1 TO 8 CARBON ATOMS WITH SATURATED DICARBOXYLIC ACIDS HAVING 2 TO 8 CARBON ATOMS AND WITH AROMATIC CARBOXYLIC ACIDS; (C) PYRIDINE DERIVATIVES; (D) DITHIOHYDANTOIN, TETRAHYDROTHIOPHENE DIOXIDE; AND MIXTURES THEREOF.
Inventors
- 👤 Gunter Reese
- 👤 Peter Berth
- 👤 Karl-Josef Boosen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:28
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/40; A61K8/42; A61K8/33; A61K8/37; A61K8/46; A61K8/49; A61K8/4906; A61K8/4926; A61K8/494; A61K8/4946; A61K8/4973; A61K8/4986; A61Q; A61Q5/00; A61Q5/06; A61Q5/065; A61K2800/00; A61K2800/40; A61K2800/42; A61K2800/43; A61K2800/432
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |